We're so back.
>requires a light fiend as material
>is a musket so can link into Max even if negated
>summons a musket to your field and sets a musket monster OR spell/trap to their field
>giving them a card turns Max on
So you can even just like as a very simple example, give them a monster and summon Caspar/Starfire/Doc, link the link 2 into Max to search Desperado since they have a monster, then use it to pop their monster and trigger the guy you summoned.
This extends and gets you extra light fiends in the GY. You can also just like send their guy to the GY with Engraver's effect and keep the trap in hand to use with Caspar for two interruptions.